"This stone building was an oil storage house and utility building. It has been commonly, but mistakenly, known since 1952 as the "change house." There is no evidence that it was ever the change house, and there is good evidence that building H-43...

"At one time this building was a fitting-up house, a finishing point in water wheel construction. Later it was the change house. The change house was instituted by Alfred I. du Pont when a workman was burned at home in his powder clothes. The frame...